Daikin UATYQ45ABAY1 [30/44] Commissioning

Translation from original instructions

Installation manual

We reserve the right to make changes without any prior notice.

UATYQ*Y1

Packaged Rooftop

4P522680-1

6 COMMISSIONING

6.1 Preliminary operations

Theunitshouldonlybestartedupbyqualiedpersonnelauthorisedbythemanufacturer.

All the units are pre-charged with refrigerant gas, so the refrigerant circuit is pressurised.

Check:

- that the electrical connection has been made correctly and that all terminals are properly tightened;

- thatthevoltageontheRSTterminalsis400V±10%(ortheratedvoltageoftheunitiftherearespecialvoltages);

- thatthegaspressureintherefrigerantcircuitsisshownonthepressuregauges(ifpresent)oronthecontrol

display;

- thattherearenorefrigerantuidleaks,usingaleakdetectorifnecessary(thepresenceofoilstainsmaybea

sign of refrigerant leaks).

Be careful with the electrical checks and use only suitable tools.

Position the master switch of the unit to ON and check on the display of the control that the unit is OFF in order to

prevent it from starting.

Check that the heaters for heating the oil in the compressor crankcases are powered correctly.

The crankcase heaters are powered when the main disconnect switch is closed and this must be done

at least 12 hours before starting the unit.

To check that the heaters are working correctly, check that the lower part of the compressors is hot and in any case

atatemperatureof10-15°Cabovetheexternaltemperature.

Check:

- that any sensors supplied with the unit are installed correctly according to the wiring diagram and the relevant

documentation;

- that the remote control, if any, is connected as shown in the wiring diagram and that it is working correctly;

- that the connection to the aeraulic system has been made correctly, via the air supply and return channels;

- that a suitable syphon has been made on the condensate drain.

Before starting the unit, check that all the closing panels of the unit are in place and secured with

xingscrews.